I've written a very small and simple ruby script for Sketchup that gives a pretty accurate estimation of the trianglecount of the model. It can probably be useful to people using the free version of sketchup.

How to install the script:1) Download the rubyscript here2) Put the downloaded file (counttriangles.rb) in the Sketchup/Plugins folder3) Restart sketchup and use the "Count triangles in model" option under "plugins".

You can also only count triangles of your current selection (useful if you have a lot of 'temporary' objects you don't wish to remove)

That's interesting. I've never felt the Face Count very useful indicator to whether it's a heavy model or not, since graphic cards ultimately deals with triangles. A face can be any number of triangles.